湿气海底管道清管分析与策略制定
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摘要
国内某长距离湿气海底管道PL因地形复杂、环境温度低等原因,在运行过程中使大量积液滞留于海管中,将加速管道的内腐蚀或水合物生成,对海管的安全运行造成威胁,因此需要根据实际情况制定合理的清管周期和清管方案。通过分析将最大积液量法用于清管时机的判定依据,计算发现,该方法得到的清管周期过于短暂。主要是因为清管段塞量过大而不能被段塞流捕集器所吸收,于是提出4种减少瞬时段塞的清管方案。通过模拟计算分析并综合现场操作难易程度,最终确定较优的清管方案和合适的清管周期。为现场的安全清管提供技术支持。
There is large liquid inventory in long-distance subsea wet gas pipelines because of complex topography.This may accelerate internal corrosion and produce hydrate,which bring safety hazards to pipeline operation.Therefore,it is imperative to determine the pigging period appropriately and make a reasonable pigging plan.The maximum liquid holdup method was adopted to determine pigging frequency in this paper.However,the pigging cycle calculated by the method is too small to operate on site.That is because the pigging slug is too large to be handled by downstream slug catcher timely.So,four schemes were presented to reduce instantaneous slug.Finally,pigging period and scheme were determined according to the calculation results and onsite operability.Analytical approaches adopted in this article may provide some technical support for subsea wet gas pipeline pigging operation.
There is large liquid inventory in long-distance subsea wet gas pipelines because of complex topography.This may accelerate internal corrosion and produce hydrate,which bring safety hazards to pipeline operation.Therefore,it is imperative to determine the pigging period appropriately and make a reasonable pigging plan.The maximum liquid holdup method was adopted to determine pigging frequency in this paper.However,the pigging cycle calculated by the method is too small to operate on site.That is because the pigging slug is too large to be handled by downstream slug catcher timely.So,four schemes were presented to reduce instantaneous slug.Finally,pigging period and scheme were determined according to the calculation results and onsite operability.Analytical approaches adopted in this article may provide some technical support for subsea wet gas pipeline pigging operation.
引文
[1]田光,鬲丽华,张科.起伏地形对宝汉天然气管道生产运行的影响[J].油气储运,2016,35(9):975-979.
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[10]Xu Xiaoxuan,Gong Jing.Pigging simulation for horizontal gas-condensate pipelines with low-liquid loading[J].Journal of Petroleum Science&Engineering,2005,48(3-4):272-280.
[11]岑康,江鑫,朱远星,等.高含硫气液混输管道在清管工况下的瞬态流动规律及优化设计[J].天然气工业,2014,34(5):131-136.
[12]李汉勇,宫敬,于达.水试压后输气管道的清管过程瞬态分析及程序设计[J].北京石油化工学院学报,2005,13(3):50-55.
[13]高超,王皓,郭东升.海底天然气管道清管风险分析及应对[J].天然气与石油,2016,34(5):6-10.
[14]郭庆丰.曹妃甸油田变径海底管道清管的可行性[J].油气储运,2016,35(11):1243-1246.
[2]陈丽,赵晓亮,丁杰.海洋平台渤中29-4项目全线通球调试实践[J].石油化工高等学校学报,2013,26(2):77-80.
[3]陈建恒,何利民,吕宇玲,等.射流清管器运动特性与清管段塞耗散分析[J].石油化工高等学校学报,2017,30(5):66-71.
[4]李传宪,黄晨醒,郁振华,等.不加热输油管道最佳清管周期影响因素研究[J].石油化工高等学校学报,2017,30(3):66-71.
[5]王玉,詹燕红.渤西南海底输气管网联合清管技术[J].天然气工业,2010,30(12):81-83.
[6]朱凯,崔大勇.渤西油气田海底输气管道清管技术[J].中国海上油气,2007,19(6):412-414.
[7]田东恩.西区油田常温集输过程清管周期研究[J].石油化工高等学校学报,2015,28(1):85-88.
[8]户凯,杨超,玉德俊,等.多约束条件清管周期优化模型研究[J].北京石油化工学院学报,2017(4):65-69.
[9]Esmaeilzadeh F,Mowla D,Asemani M.Mathematical modeling and simulation of pigging operation in gas and liquid pipelines[J].Journal of Petroleum Science&Engineering,2009,69(1-2):100-106.
[10]Xu Xiaoxuan,Gong Jing.Pigging simulation for horizontal gas-condensate pipelines with low-liquid loading[J].Journal of Petroleum Science&Engineering,2005,48(3-4):272-280.
[11]岑康,江鑫,朱远星,等.高含硫气液混输管道在清管工况下的瞬态流动规律及优化设计[J].天然气工业,2014,34(5):131-136.
[12]李汉勇,宫敬,于达.水试压后输气管道的清管过程瞬态分析及程序设计[J].北京石油化工学院学报,2005,13(3):50-55.
[13]高超,王皓,郭东升.海底天然气管道清管风险分析及应对[J].天然气与石油,2016,34(5):6-10.
[14]郭庆丰.曹妃甸油田变径海底管道清管的可行性[J].油气储运,2016,35(11):1243-1246.